Multiple Choice Questions

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Assertion : Small intestine is the principal organ for absorption of nutrients.

Reason : Absorption of water, simple sugars and alcohol etc. takes place in small intestine.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are hue but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


C.

If assertion is true but reason is false.

Absorption of substances takes place in different parts of the alimentary canal, like mouth, stomach, small intestine and large intestine. However, maximum absorption occurs in the small intestine. Therefore, small intestine is the principal organ for absorption of nutrients. Digestion is completed here and the final products of digestion that is glucose, fructose, fatty acids etc are absorbed through the mucosa into the blood stream and lymph.

However, absorption of sugar, water, alcohol etc takes place in stomach. It mainly takes place in large intestine where absorption of minerals and drugs take place too.


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Which of the following gastric secretions is correctly matched with its source?

  • Pepsin - Chief cells

  • Chymotrypsin - Parietal cells

  • HCl - Goblet cells

  • Mucus - Oxyntic cells


Assertion: HCl converts pepsinogen into active enzyme pepsin.

Reason: Pepsin converts protein into proteoses and peptones.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


Assertion: Emulsification is necessary for the digestion of fats.

Reason: After fats are emulsified, the action of enzyme amylase gets significantly increased.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


Assertion: In jaundice, the skin and mucous membranes assume a yellowish hue

Reason: Yellow pigment bilirubin imparts pale yellow colour to blood plasma

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


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Assertion: No taste sensation is evoked when drop of distilled water is put on human tongue.

Reason: Man does not possess taste buds for tasting water.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


Assertion: Oxytocin is also known as Antidiuretic hormone (ADH).

Reason: Oxytocin can cause an increase in the renal reabsorption of water.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false


Assertion : Duodenum is the main organ of small intestine.

Reason : In duodenum, digestion and absorption mainly occurs.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are hue but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


Assertion : Bile is essential for the digestion of lipids.

Reason : Bile juice contains enzymes bilirubin and biliverdin.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of the assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


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Duodenum has characteristic Brunner's gland which secretes two hormones called

  • prolactin, parathormone

  • secretin, cholecystokinin

  • enterocrinin, duocrinin

  • gastrin, enterogastrone


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